x? +3x+9/4=2+9/4
(x+3/2)? = 17/4
x+3/2= √ 17/2
x 1 =√ 17/2-3/2; ? x2= -√ 17/2-3/2
2)、
x? +2x-3=0
(x+3)(x- 1)=0
Solution, x1=-3; 3; x2 = 1;
3)、
x? -2√2x+2=0
(x-√2)? =0
Solution, x1= x2 = √ 2;
4)、
3x? -x+2=0
(3x+2)(x- 1)=0
Solution, x1=-2/3; 2/3; x2= 1
Mathematics is a tool of knowledge and a source of other knowledge tools. Do fourth-grade students know how to do mat